1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lawyer [7]
3 years ago
14

(70) Points PLEASE HELP

Mathematics
2 answers:
NISA [10]3 years ago
6 0
Hello!

To estimate square roots, you will find what perfect squares it is in between. For example, the number 51 would be between 7 and 8, as it is in between 49 and 64. Then you will keep on making estimations to the hundredth on the calculator and see which is closest.

40 is in between 6 and 7, and is probably found near the beginning or middle. Let's estimate a bit.

6.5²=42.25
6.4²=40.96
6.3²=39.69

The first two digits of are 6.3, as it is the closest number to 40. 6.4 was close as well, so the hundredths digit will probably be found in the beginning/middle again.

6.35²≈40.32
6.33²≈40.06
6.32²=39.94

The best estimation for √40 is about 6.32.
-----------------------------------------------------------------------------
For the next few questions I will just show you the work.

8.5²=72.25
8.6²=73.96
8.7²=75.69

8.7 is closest, but we cannot get it to go backwards. We will switch to 8.6 to get it closer, and select the middle/end numbers.

8.65²≈74.82
8.66²≈75

Our estimation for √75 is 8.66.
-------------------------------------------------------------------------
9.5²=90.25
9.4²88.36

9.5² is the closest to 90, but we cannot add hundredths to make it smaller. We will use 9.4 and use larger hundred digits.

9.49²≈90.1

Our estimation for √90 is 9.49.
-----------------------------------------------------------
15.5²=240.25
15.6²=243.36
15.7²=246.49

We will now use 15.6.

15.68²≈245.9
15.67²≈245.5
15.66²≈245.24
15.65²≈244.92

I believe our best estimation for√245 is 15.65
-----------------------------------------------------------------------------------------
21.5²=462.25
21.4²=457.96
21.3²=453.69
21.2²=449.44

21.2 seems like the best number to continue on with.

21.23²≈450.71
21.22²≈450.29
21.21²≈449.86
 
Our estimation for√450 is 21.21.
------------------------------------------------------------------------
25.5²=650.25
25.4²=645.16
25.3²=640.09
25.2²=635.04

25.3 is just above 40, but we need to have a hundredths place. Therefore, we will select 25.2.

25.29²≈639.58

Our estimation for √640 is is 25.29.
-------------------------------------------------------------------------------
25.5²=650.25
25.7²=660.49
25.9²=670.81

As 25.9 is just a bit over 670, we will use 25.8

25.89²≈670.29
25.88²=669.77

Our estimation for √670 is 25.88.
--------------------------------------------------------------------
Our estimations for each question are seen below.
√40≈6.32
√75≈8.66
√90≈9.49
√245≈15.65
√450≈21.21
√640≈25.29
√670≈25.88

I hope this helps!
Have a wonderful day!














wlad13 [49]3 years ago
4 0

Answer:

√40≈6.32

√75≈8.66

√90≈9.49

√245≈15.65

√450≈21.21

√640≈25.29

√670≈25.88

Step-by-step explanation:

You might be interested in
Leah claims that these figures are not similar. When she compared the heights, she wrote 27. Then she compared the bases and got
Flauer [41]

Answer:

<h2>Leah is actually wrong, because those rectangles are similar.</h2>

Step-by-step explanation:

Remember that similarity is about having proportional sides and congruent angles. When we have congruent sides, then those rectangles are congruent not similar.

In this case, to find the similarity, Leah should compare bases and heights thorugh division, because the ratio between heights and the ratio between bases must be equal. So, let's divide.

\frac{21}{6}=3.5

\frac{7}{2}=3.5

As you can observe, both ratios are equal.

Therefore, those rectangles are congruent.

4 0
3 years ago
How many numbers of possible live card hands (hands in five-card poker) drawn without replacement from a standard deck of 52 pla
makkiz [27]

The combination shows that the numbers of possible live card hands drawn without replacement from a standard deck of 52 playing cards is 2,598,960.

<h3>How to explain the information?</h3>

A permutation is the act of arranging the objects or numbers in order while combinations are the way of selecting the objects from a group of objects or collection such that the order of the objects does not matter.

Since the order does not matter, it means that each hand is a combination of five cards from a total of 52.

We use the formula for combinations and see that there are a total number of C( 52, 5 ) = 2,598,960 possible hands.

Learn more about permutations and combination on:

brainly.com/question/4658834

#SPJ1

3 0
2 years ago
Someone plz help me giving brainliest
sukhopar [10]

Answer:

1/14

Step-by-step explanation:

1 - 5/7 = 7/7 - 5/7 = (7-5)/7

Subtract. 7 - 5 = 2

= 2/7

Now we have to multiply 2/7 and 1/4

We get 2/7 x 1/4 = <em>1/14</em>

7 0
3 years ago
According to the rational root theorem, which number is a potential root of
11Alexandr11 [23.1K]
Potential roots have the format

factors of the constant term
-------------------------------------
factors of the initial term

Here, 7/3 is the only possible root that has a 7 in the numerator and a factor of 9 in the denominator.

Verify that 7/3 is a root using synthetic division.
6 0
3 years ago
You make $7 an hour. You work 40 hours a week for a year. (52 weeks) How much will you make?
valina [46]

If you made $7 an hour and worked for 40 hours, every day for a year, you would make $14,560 a year and about $1,213.33 a month.

Because 7 x 40 = 280 (which is how much money you make a week.)

And 280 x 52 = 14,560 (because you would work for 52 weeks).

I hope this helped! Good luck and have a great night!

8 0
3 years ago
Other questions:
  • A=1/2h(B+b); a=6,b=2, b=1<br><br> What is h
    12·1 answer
  • The ratio of girls to boys in class is 9 to 7 and there are 80 students in the class. how many girls are in the class?
    8·1 answer
  • A piece of paper is 11 inches long and 8.5 inches wide. What is the area of the paper in square centimeters? (Please show work!)
    9·1 answer
  • What is the answer to 5 x 5/8
    11·2 answers
  • 3+ Y Divided by 2 =6
    12·1 answer
  • What divided by 20equals 12
    14·1 answer
  • Tickets for a school play cost $7 and $10 for the adults. The equation 7x+10y=80 represents the number of students(x) and the nu
    14·1 answer
  • 70% of x is 63. Write an equation that represents this statement.
    6·1 answer
  • What is the distance between points (7,2) and (-4,2) on the coordinate plane?
    5·2 answers
  • A friend of mine borrowed $800 for 3 years. He claims he paid $968 for the interest and principal. What was the rate on the loan
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!